Brake.



PATBNTED OCT. 9, 1906.

s. MARCO'.

BRAKE.

APPLIGATION FILED rms.1a,19o.

STEPHEN MARCO, OF TERCIO, COLORADO.

BRAKE.

Specification of Letters Patent.

Iatented Oct. 9, 1906.

Application filed February 13, 1906. Serial No. 300,924.

T0 all whom it may concern:

Be it known that I, STEPHEN MARCO, a citizen of the United States,residing at Tercio, in the county of Las Animas and State of Colorado,have invented new and useful Improvements in Brakes, of which thefollowing is a specification.

This invention relates to brakes designed especially for use uponrailway-cars, and has for its objects to produce a comparatively simpleinexpensive device of this character which may be readily installed, onewherein the brake mechanism may be readily operated either manuallyor'automatically, one in which the automatic operation of the brake maybe effected independently of the manual controlling means, and one inwhich the parts of the mechanism may be conveniently adjusted forvaryingthe amount of power re uisite for moving the brakes.

With t ese and other objects in view the invention comprises the novelfeatures of construction and combination of parts more fully hereinafterdescribed.

In the accompanying drawings, Figure 1 is a bottom plan view of thebrake mechanism embodying the invention and showing the same applied foruse. Fig. 2 is a detail front elevation of the rotary operating-shaftand adjacent parts. Fig. 3 is a detail view of the segment operatingweight and its guides, Fig. 4 is a detail perspective view of portionsof the traction-rod included in the brake mechanism.

Referring to the drawings, 1 designates a car having axles 2 equippedwith wheels 3, these parts, which are conventionally shown herein, beingof the usual or any preferred construction and material. and adapted toperform their ordinary functions.

Sustained beneath the car in any suitable manner and between the axles 2is a pair of movable brake-beams 4, equipped with brake-shoes 5, adaptedto act upon the wheels, said beams being connected for relative movementthrough the medium of a pair of levers 6 7, in turn connected by a link8. The lever 6 is pivoted at its lower end in a fixed bearing 9, whilethe lower end of lever 7 is connected, by means of a connecting rod orlink 10, with one end of a power-lever 11, fulcrumed at its longitudinalcenter, as at 12, and having its other end connected with the rear endof a traction rod or element 13 by means of a pin 14, arranged to workin a slot 15 in the rod, there being pivotally engaged with the lever 11at that side of its fulcrum remote from the link 10 the rod 16 of apiston adapted to work in an air-cylinder 17, fixed beneath the car.

Journaled in suitable bearings at the end of the car is a rotarybrake-shaft 18, provided at its upper end with a hand-wheel 19 and atits lower end With a pinion 20 in mesh with a segmental rack 21, pivotedat 22 in a suitable bearing 23 beneath the car and ivotally connectedwith the forward end ofp the tractionrod 13, there being fixed to thebearing 23 in advance of the pivot 22 a spring-stop 24 for limiting therearward movement of the rack 21 and attendant parts under the influenceof a weight 25, slidably mounted upon vertical guides 26 and connectedwith the rack 21 by a iiexible cord or element 27, adapted to travelbetween its ends over a guide-pulley 28, said weight serving to returnthe parts to normal position after operation by the shaft 18.

The brake-rod 13 comprises a front section 29 and a rear section 30, ofwhich the latter is provided at its forward end with a series oflongitudinally-spaced teeth 31, adapted for engagement with a transversecoupling member or pin 32, fixed in the rear end of a longitudinalslotted head 33, provided on the rear end of the section 29, the head33, which has a slot 34 to receive the toothed portion or section 30,having its side portions terminating at their rear ends in downturnedbearingfingers 35 to guide the section 31 during adjustment of theparts, it being understood that under this construction the length ofthe rod 13 may be varied, as circumstances require, by engagingdifferent ones of the teeth 31 with the coupling-pin 32.

In practice the parts stand normally in the position illustrated in Fig.1, and when the shaft 18 is rotated in the direction indicated by thearrow in said figure the segmental rack 21 will be swung forwardly onits pivot, thereby exerting forward traction on the rod 13 for swingingthe power-lever 11 on its pivot and acting through the link 10 andlevers 6 7 for moving the brakes to braking position and at the sametime lifting the weight 25, which will when the shaft 18 is releasedreturn the parts to normal position, it being understood that the returnmovement of the parts will be limited by the spring-stop 24. When it isdesired to operate the mech- IOO IIO

anism automatically, air or steam is admitted in the usual manner to thecylinder 17 for moving the piston therewith, which acts through its rod16 to swing the lever 1'1 on its fulcrum and move the brakes, as beforeexplained, it being apparent that during this operation of the arts thelever 11 may move independently or the rod 13 and its operatingmechanism, owing to thepin 14 traveling in the slot 15.

Having thus described my invention, what I claim is- 1. In a device ofthe class described, a brake-beam, a ower-lever operatively connectedtherewith, an oscillatory toothed member, a rotary shaft having a pinionin mesh with said member and a traction-rod connecting the toothedmember and lever,

said rod comprising a pair of sections adjustably connected one with theother.

2. In a device of the class described, a brake-beam, a power-leveroperatively connected therewith, a toothed oscillatory member, abrake-shaft having a pinion in mesh with said member, a traction-rodconnected with the member and having a slot-and-pin connection with thelever, a cylinder, and a piston movable therein and operatively engagedwith the lever.

In testimony whereof I affix my signature in presence of two witnesses.

STEPHEN MARCO.

Witnesses:

O. E. ANDERSON, S. R. RIsLEY.

